Automobile pedal travel testing device

Abstract

The invention discloses an automobile pedal travel testing device, which relates to the technical field of automobile testing, and comprises a pedal bracket, a base, a sliding frame and a rack, and is characterized in that the sliding frame is mounted at the top of the base; the rack is slidably mounted in the sliding frame; the mounting table is mounted on one side wall of the sliding frame, and the gear disc is mounted on the side, away from the sliding frame, of the mounting table; a spiral strip is mounted on the side, close to the mounting table, of the gear disc and engaged with the rack. A scale plate is mounted at the top of the sliding frame, a stroke line for measuring the displacement of the rack is formed on the scale plate, and an indicator plate is fixedly connected to the top of the rack; angle lines used for measuring the rotation angle of the gear disc are formed on the edge of the gear disc. A pointer is erected on the side, close to the gear disc, of the sliding frame. And the transmission assembly is used for driving the gear disc to synchronously rotate along with the automobile pedal and reserving a stroke test result. Through the design of the gear disc and the rack, the rotation stroke and the movement stroke of the automobile pedal can be measured at the same time, and the accuracy of test results is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile testing, in particular to a kind of automobile pedal stroke testing device. BACKGROUND

[0002] Automobile pedal (including brake pedal, accelerator pedal and clutch pedal) is the core component of driver and vehicle control system interaction, and its performance directly affects driving comfort, safety and vehicle handling performance.The rationality of pedal stroke and operating force determines the vehicle response characteristics, for example: the relationship between the stroke of brake pedal and braking force affects emergency braking effect, the linearity of accelerator pedal affects acceleration smoothness, and the position of clutch pedal combination point is related to gear shifting smoothness.Therefore, it is crucial to accurately test pedal stroke, force value and dynamic characteristics.

[0003] The stroke testing device in the prior art mainly relies on various electronic sensors (such as displacement sensors and angle sensors) to monitor the stroke of automobile pedal, analyzes the position change of initial position and final position after stepping of automobile pedal through displacement sensor, thereby detecting the linear stroke of automobile pedal, analyzes the angle change of initial position and final position after stepping of automobile pedal through angle sensor, thereby detecting the rotating stroke of automobile pedal, and realizes the stroke testing function of automobile pedal.

[0004] The measurement accuracy of electronic sensor is easily affected by factors such as usage frequency, device accuracy and electromagnetic interference, resulting in errors in test results.The stroke testing device in the prior art only relies on electronic sensor for testing, lacks reliable mechanical measurement structure to assist verification of test results, and thus has low reliability of test results.Therefore, it is necessary to propose an automobile pedal stroke testing device capable of verifying test results by mechanical measurement while testing by electronic sensor. SUMMARY

[0005] To solve the above problems, the present application provides an automobile pedal stroke testing device, which can drive the gear disc to rotate synchronously with the automobile pedal and drive the rack to slide through the design of the gear disc and the rack, calculate the rotating stroke and moving stroke of the automobile pedal according to the rotating angle of the gear disc and the sliding amount of the rack, thereby realizing mechanical measurement of the automobile pedal stroke, and comparing with electronic measurement results to improve the accuracy of test results.

[0006] In order to achieve the above object, the technical scheme of the present application is as follows: A kind of automobile pedal stroke testing device for testing the stroke of automobile pedal, including the pedal support connected with automobile pedal, still include: base, sliding frame and rack, sliding frame is installed at the top of base;Rack is vertically slidably installed in sliding frame, and the teeth on rack extend out of sliding frame;Mounting table and gear disc, mounting table is installed at the side wall of sliding frame, gear disc is installed at the side away from sliding frame of mounting table;Spiral strip is fixedly connected with gear disc on the side close to mounting table, and spiral strip is engaged with rack;Scale board, scale board is installed at the end away from base of sliding frame;Scale board is formed with stroke line for measuring the displacement of rack, the top of rack is fixedly connected with indicator board, and the displacement of rack can be obtained by observing the position of indicator board corresponding stroke line;The edge of gear disc is formed with angle line for measuring the rotation angle of gear disc, and indicating needle is fixedly erected on the side close to gear disc of sliding frame, and the rotation angle of gear disc can be obtained by observing the position of indicating needle corresponding angle line;Transmission assembly, transmission assembly is connected with automobile pedal and gear disc respectively, for driving gear disc to rotate synchronously with automobile pedal and retaining stroke test result.

[0007] The technical principle of the above scheme is as follows: When automobile pedal rotates, the transmission assembly connected with automobile pedal and gear disc respectively drives gear disc to rotate synchronously with automobile pedal, at this time, the angle line aimed at by indicating needle is the rotation angle of gear disc, and then the rotation stroke of automobile pedal can be calculated according to geometric relationship;When gear disc rotates, because spiral strip is engaged with rack, and rack is vertically slidably matched with sliding frame, therefore, the rotation of spiral strip drives rack to vertically slide along sliding frame, at this time, the stroke line aimed at by indicator board is the displacement of rack, and then the displacement of automobile pedal can be calculated according to geometric relationship.

[0008] When the operator releases the pedal, rack and gear disc remain stationary, so as to retain test result.

[0009] The above scheme has the following beneficial effects: 1, the stroke test device in prior art, only rely on electronic sensor for testing, lack reliable mechanical measurement structure to assist verification of test result, resulting in that the reliability of test result is low;The present scheme can effectively measure the rotation angle and displacement of automobile pedal by mechanical transmission through the design of gear disc and rack, because gear disc rotates synchronously with automobile pedal, therefore, the rotation angle of gear disc is equal to the rotation angle of automobile pedal;And the rotation angle of gear disc and the displacement of rack are proportional, and the rotation angle of gear disc is equal to the rotation angle of automobile pedal, therefore, the displacement of rack and the displacement of automobile pedal are also proportional, so as to effectively realize the mechanical measurement of the rotation angle and displacement of automobile pedal.

[0010] 2. Existing stroke testing devices require the use of different equipment or sensors to measure the rotation angle and displacement of the car pedal separately. This solution, through the design of a gear plate and rack, can simultaneously measure the rotation angle and displacement of the car pedal, eliminating the need for two separate sets of equipment. This effectively improves testing efficiency and reduces testing costs and complexity.

[0011] 3. Existing testing devices, such as rope-pulling testing devices or dimensional measuring devices, cause the test results to disappear immediately after the tester releases the car pedal. This requires the tester to observe the test data while pressing the car pedal, necessitating timely observation. Furthermore, physical obstruction during observation can make the process inconvenient. In this solution, the gear plate and rack do not automatically reset after the pedal is reset. The tester does not need to continuously press the car pedal, and the device automatically retains the test results, facilitating observation by the operator.

[0012] Furthermore, the transmission assembly includes a rotating platform, a placement frame, a telescopic rod, and parallel rods. The rotating platform is rotatably connected to the gear disk on the same axis. A pawl is hinged to the outer wall of the rotating platform, and the end of the pawl away from the rotating platform meshes with the gear disk so that the gear disk can rotate with the rotating platform. A telescopic rod is also installed on the side wall of the rotating platform. Several parallel rods are hinged to the side of the telescopic rod away from the rotating platform, and the end of each parallel rod away from the telescopic rod is hinged to the placement frame. The telescopic rod is arranged parallel to the placement frame.

[0013] Based on the aforementioned technical means, the design of the ratchet allows for the retention of test results, improving the convenience of observing test results.

[0014] Furthermore, the ratio of the displacement of the telescopic rod during rotation to the displacement of the rack during vertical sliding is set as a proportionality coefficient, with the proportionality coefficient ranging from 1 to 5.

[0015] Based on the aforementioned technical means, testers can quickly calculate the displacement of the car pedal according to the proportional coefficient and the displacement when the rack slides vertically.

[0016] Furthermore, it also includes a fixing component for fixing car pedals of different sizes within the placement frame; the fixing component includes a controller and an electronically controlled cylinder mounted on the inner wall of the placement frame, with a fixing plate fixedly connected to the output shaft of the electronically controlled cylinder; the controller is used to control the operation of the electronically controlled cylinder to adjust the position of the fixing plate.

[0017] Based on the above technical means, the design of the placement frame and the fixing plate makes the placement frame suitable for different sizes of car pedals, further making the device suitable for different sizes of car pedals, thus improving the practicality and applicability of the device.

[0018] Further, the bottom of the placing frame is provided with an avoiding groove for transverse sliding of the pedal support.

[0019] According to the above technical means, the avoiding groove can avoid the placing frame and the pedal support from being hindered, so that the placing frame cannot fix the automobile pedal.

[0020] Further, the top of the scale board is provided with an identification component for collecting images of the indicating board and the indicating needle; the identification component comprises an image identifier fixedly connected to the top of the scale board, and the image identifier is in control connection with the controller, so that the controller can control the image identifier to operate.

[0021] According to the above technical means, the image identifier can effectively collect images of the indicating board and the indicating needle, so as to facilitate subsequent analysis of the displacement and the rotation angle of the automobile pedal, and improve the automation degree of the device and the accuracy of data processing.

[0022] Further, the placing frame is provided with an electronic detection component for measuring the displacement, the rotation angle and the pressure value of the placing frame; the electronic detection component comprises a displacement sensor, an angle sensor and a pressure sensor installed in the placing frame.

[0023] According to the above technical means, since the placing frame rotates synchronously with the automobile pedal and the placing frame is pressed instead of the automobile pedal, the displacement and the rotation angle of the placing frame are the same as those of the automobile pedal, and the pressure of the placing frame is equivalent to that of the automobile pedal; by collecting the displacement, the rotation angle and the pressure of the placing frame through the displacement sensor, the angle sensor and the pressure sensor, the data of the automobile pedal can be analyzed, and the measurement accuracy and convenience are improved.

[0024] Further, the comprehensive analysis system comprises a displacement analysis module, an angle analysis module and a mechanical monitoring module.

[0025] The displacement analysis module is configured to receive the displacement of the automobile pedal collected by the displacement sensor to obtain a first displacement; the displacement analysis module is also configured to collect the image of the indicating board identified by the image identifier, analyze the error value of the value currently indicated by the indicating board based on the image of the indicating board, subtract the displacement of the rack from the error value to obtain the current displacement of the rack, calculate the displacement of the automobile pedal based on the proportion coefficient to obtain a second displacement; the displacement analysis module is also configured to set a displacement threshold, obtain an actual displacement difference value according to the difference between the first displacement and the second displacement, and judge the reliability of the first displacement based on the actual displacement difference value and the displacement threshold; when the actual displacement difference value is less than the displacement threshold, the displacement analysis module judges that the first displacement is reliable; when the actual displacement difference value is greater than the displacement threshold, the displacement analysis module judges that the second displacement is reliable, and sends a calibration reminder of the displacement sensor.

[0026] The angle analysis module is used for receiving the rotation angle of the automobile pedal collected by the angle sensor to obtain a first rotation angle; is also used for collecting the indicator needle image identified by the image identifier, analyzing the value currently indicated by the indicator needle based on the indicator needle image, obtaining the current rotation angle of the gear disc, and analyzing the rotation angle of the automobile pedal based on the current rotation angle of the gear disc minus the error value of the displacement amount of the rack to obtain a second rotation angle; is also used for setting a rotation threshold value, calculating the difference value of the first rotation angle and the second rotation angle to obtain an actual rotation difference value, and judging the reliability of the first rotation angle based on the actual rotation difference value and the rotation threshold value; when the actual rotation difference value is less than the rotation threshold value, the angle analysis module judges that the first rotation angle is reliable; and when the actual rotation difference value is greater than the rotation threshold value, the angle analysis module judges that the second rotation angle is reliable, and an angle sensor calibration reminder is sent.

[0027] The mechanical monitoring module is used for receiving the pressure value of the placement frame collected by the pressure sensor, analyzing the pressure value of the automobile pedal based on the pressure value of the placement frame, and obtaining a pressure detection value.

[0028] Further, the second displacement amount calculation formula is as follows: .

[0029] Wherein, K is a proportional coefficient, L0 is the current displacement amount of the rack, and L2 is the second displacement amount.

[0030] Further, the base is provided with a piston cavity, and a piston plate is vertically and slidingly fitted in the piston cavity; the rack extends to the piston cavity at the bottom and is fixedly connected with the top of the piston plate, and a plurality of adsorption holes are formed in the bottom of the base.

[0031] According to the above technical means, the device and the automobile are further fixed by the adsorption holes, and the stability of the device is improved.

[0032] Beneficial effects: the existing travel test device only relies on electronic sensors for testing, and lacks reliable mechanical measurement structures to assist in verifying the test results; the present scheme compares and analyzes the data measured by the electronic sensor with the data measured and calculated by the mechanical measurement, uses the test results of the mechanical measurement to assist in judging the test results of the electronic sensor measurement, and thus improves the accuracy and reliability of the test.

[0033] Additional aspects and advantages of the application will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is the overall structure of the automobile pedal travel test device.

[0035] Figure 2 Figure 1 is a front view of the overall structure of the automobile pedal stroke testing device of the present application connected to the automobile pedal.

[0036] Figure 3 Figure 2 is a side view of the partial structure of the automobile pedal stroke testing device of the present application.

[0037] Figure 4 Figure 3 is a schematic view of the structure of the spiral strip installed on the gear disc of the present application.

[0038] Figure 5 Figure 4 is a sectional view of the base of the automobile pedal stroke testing device of the present application.

[0039] Figure 6 Figure 5 is a sectional view of the placement frame of the automobile pedal stroke testing device of the present application.

[0040] The reference signs in the drawings of the specification include: 1, base; 2, sliding frame; 3, rack; 4, mounting table; 5, gear disc; 6, spiral strip; 7, scale plate; 8, indicator plate; 9, indicator needle; 10, rotating table; 11, placement frame; 12, pawl; 13, telescopic rod; 14, parallel rod; 15, electric control cylinder; 16, fixed plate; 17, piston plate; 18, adsorption hole; 19, avoidance groove; 20, image recognizer; 21, pedal support. DETAILED DESCRIPTION

[0041] The following is further described in detail through specific embodiments: Example 1 As shown in Figure 1 and Figure 2 , the present embodiment discloses an automobile pedal stroke testing device for testing the stroke of an automobile pedal, which comprises a pedal support 21 (as shown in Figure 2 , the present embodiment selects a suspended pedal support 21) detachably connected to the automobile pedal, and a base 1; the top of the base 1 is welded with a sliding frame 2, and the sliding frame 2 is vertically slidably installed with a rack 3; as shown in Figure 3 and Figure 4As shown in the figure, the side wall of the sliding frame 2 is welded with a mounting table 4, the mounting table 4 is rotationally matched with a gear disc 5 (diameter 120mm) away from one side of the sliding frame 2, the gear disc 5 is bolted and fixedly connected with a spiral strip 6 (spiral angle 15°) close to one side of the mounting table 4, the gear rack 3 is engaged with the spiral strip 6; the top of the sliding frame 2 is welded with a scale plate 7, the scale plate 7 is engraved with a travel line (maximum range 10cm) for measuring the displacement amount (linear distance before and after sliding) of the gear rack 3, the top of the gear rack 3 is fixedly connected with an indicator plate 8 through a screw, and the displacement amount of the gear rack 3 in the vertical direction can be obtained by observing the position of the corresponding travel line of the indicator plate 8; the edge of the gear disc 5 is engraved with an angle line (maximum range 360°) for measuring the rotation angle (rotation angle before and after rotation) of the gear disc 5, the gear disc 5 is bolted and fixedly erected with an indicating needle 9 close to one side of the sliding frame 2, and the rotation angle of the gear disc 5 can be obtained by observing the position of the corresponding angle line of the indicating needle 9; further comprising a transmission assembly, the transmission assembly is connected with the automobile pedal and the gear disc 5 respectively, and is used for driving the gear disc 5 to rotate synchronously with the automobile pedal and retaining the travel test result.

[0042] As shown in the figure, Figure 2 The transmission assembly comprises a rotating table 10 and a placing frame 11, a telescopic rod 13 and a parallel rod 14; the rotating table 10 is coaxially rotationally connected with the gear disc 5, a pawl 12 is hinged on the outer side wall of the rotating table 10, one end of the pawl 12 away from the rotating table 10 is engaged with the gear disc 5 (as shown in the figure, Figure 2 The pawl 12 is used to drive the gear disc 5 to rotate clockwise, when the rotating table 10 shown in the figure Figure 2 Rotates clockwise, the gear disc 5 can also rotate clockwise with the rotating table 10); the rotating table 10 is bolted and fixedly connected with the telescopic rod 13 (adjustable range 25-50mm) on it, a plurality of parallel rods 14 are hinged on the side of the telescopic rod 13 away from the rotating table 10, and one end of each parallel rod 14 away from the telescopic rod 13 is hinged with the placing frame 11; the telescopic rod 13 is arranged in parallel with the placing frame 11. The placing frame 11 is provided with an avoiding groove 19 at the bottom for the transverse sliding of the pedal support 21. The avoiding groove 19 can avoid the interference between the placing frame 11 and the pedal support 21, so that the placing frame 11 cannot fix the automobile pedal.

[0043] The ratio of the displacement amount of the telescopic rod 13 when rotating to the displacement amount of the gear rack 3 when vertically sliding is set as a proportionality coefficient, and the proportionality coefficient is in the range of 1-5 (in actual testing, the proportionality coefficient can be adjusted according to the actual testing condition, and in the embodiment, the proportionality coefficient is 3).

[0044] Specifically, as shown in the figure, Figure 1 In the initial state, the indicator plate 8 is aligned with the starting position (0 scale line) of the travel line, and the indicating needle 9 is aligned with the starting position (0 scale line) of the angle line.

[0045] Before starting the test, the tester places the base 1 horizontally on the inner wall of the car. The angle and length of the telescopic rod 13 are adjusted according to the angle and height of the car pedal, so that the telescopic rod 13 is parallel to the car pedal. Since the telescopic rod 13 is set parallel to the placement frame 11, the angle and height of the placement frame 11 will also change when the tester adjusts the angle and length of the telescopic rod 13. The placement frame 11 will rotate synchronously with the rotation of the telescopic rod 13, and the height of the placement frame 11 will rise and fall with the extension and retraction of the telescopic rod 13. After adjusting the placement frame 11 to be parallel and at the same height with the car pedal, the car pedal is fixed with the placement frame 11, and the test can begin.

[0046] like Figure 2 As shown, during the test, the tester steps on the placement frame 11, causing the placement frame 11 to drive the car pedal and pedal bracket 21 to rotate clockwise around the mounting point of the pedal bracket 21 on the car. At this time, the placement frame 11 will pull the telescopic rod 13 and the rotating platform 10 to rotate clockwise synchronously through the parallel rods 14. The rotating platform 10 will then drive the pawl 12 to rotate clockwise. Since the pawl 12 meshes with the gear disk 5, the pawl 12 will drive the gear disk 5 and the angle line engraved on the outer edge of the gear disk 5 to rotate clockwise synchronously. After the rotation is completed, the angle line pointed to by the indicator needle 9 is the rotation angle of the gear disk 5. Since the gear disk 5 rotates synchronously with the car pedal, the rotation angle of the gear disk 5 can be used to reflect the rotation angle of the car pedal. However, due to the influence of the tooth pitch, there is a slight error between the rotation angle of the gear disk 5 and the rotation angle of the car pedal (this error value is proportional to the tooth pitch; in this embodiment, the error is about ±0.1°). The rotation angle of the gear disk 5 minus the error value is equal to the rotation angle of the car pedal.

[0047] During this process, because the spiral 6 meshes with the rack 3 (two adjacent teeth of the rack 3 are respectively engaged in the gaps on the adjacent sides of the spiral 6), the rack 3 slides vertically with the sliding frame 2. Therefore, the rotation of the spiral 6 will drive the rack 3 to slide vertically along the sliding frame 2. At this time, the stroke line aligned with the indicator plate 8 is the vertical movement stroke of the rack 3. Since the displacement of the telescopic rod 13 when it rotates is 3 times the displacement of the rack 3 (the proportional coefficient is 3 in this embodiment), and the rotation angle of the telescopic rod 13 is basically equal to the rotation angle of the car pedal (minus...) After deducting the error, and since the telescopic rod 13 is set parallel to the car pedal, the displacement of the telescopic rod 13 is equal to the displacement of the car pedal. Therefore, the displacement of the rack 3 can be used to reflect the displacement of the car pedal. Due to the error in the rotation angle, there will also be an error between the displacement of the car pedal and the displacement of the rack 3 (this error value is also proportional to the tooth pitch; in this embodiment, the error is approximately ±0.15mm). The displacement of the telescopic rod 13 (i.e., the displacement of the end of the telescopic rod 13 away from the rotating platform 10) minus the error value equals the displacement of the car pedal.

[0048] In actual use, the number of spiral turns of the 6-screw is selectable.

[0049] like Figure 2 As shown, after the test, the tester can release the car pedal. At this time, the car pedal rebounds, causing the placement frame 11 to reset. Under the transmission action of the parallel rod 14, the telescopic rod 13 and the rotating platform 10 will also rotate and reset. The rotating platform 10 will also drive the pawl 12 to rotate counterclockwise. However, since the pawl 12 only drives the gear disk 5 to rotate clockwise, the gear disk 5 and the rack 3 will remain stationary. In this embodiment, an electromagnet for attracting the rack 3 is embedded in the inner wall of the sliding frame 2. The controller can control the operation of the electromagnet. When the rack 3 is stationary, the electromagnet will attract and fix the rack 3, further ensuring the stability of the rack 3 (the force generated by the gear disk 5 when it rotates on the rack 3 is greater than the attraction of the electromagnet, and the attraction of the electromagnet is greater than the weight of the rack 3). This keeps the positions indicated by the indicator needle 9 and the indicator plate 8 unchanged, thus preserving the test results.

[0050] Existing testing devices, such as rope-pulling testing devices or dimensional measuring devices, cause the test results to disappear immediately after the tester releases the car pedal. This necessitates the tester to observe the test data while simultaneously pressing the pedal, requiring timely observation. Furthermore, the observation process may be hampered by physical obstruction (occupying approximately 30% of the observation space), requiring at least two testers and incurring significant resource investment. In this solution, after the pedal is reset, the gear disk 5 and rack 3 do not automatically reset under the attraction of the electromagnet. The tester does not need to continuously press the car pedal, and the device automatically retains the test results, facilitating observation (improving observation convenience by approximately 30%). Moreover, only one tester is required to conveniently complete the testing and observation recording process, further enhancing convenience.

[0051] The placement frame 11 is equipped with an electronic detection component for measuring the displacement, rotation angle and pressure value of the placement frame 11. The electronic detection component includes a displacement sensor, an angle sensor and a pressure sensor embedded in the placement frame 11.

[0052] Specifically, during the test, the placing frame 11 rotates synchronously with the automobile pedal, and the placing frame 11 is pressed instead of the automobile pedal, so the displacement and the rotation angle of the placing frame 11 are the same, and the pressure received by the placing frame 11 is equivalent to the pressure received by the automobile pedal; the displacement, the rotation angle and the pressure received by the placing frame 11 are collected through the displacement sensor, the angle sensor and the pressure sensor, so the displacement, the rotation angle and the pressure received by the automobile pedal can be obtained, and the test personnel can compare the data measured by the mechanical measurement with the data measured by various sensors to effectively judge whether the test result is accurate and reasonable, and improve the reliability of the test result.

[0053] As shown in Figure 6 , the placing frame 11 is provided with a fixing assembly for fixing automobile pedals of different sizes; the fixing assembly comprises a controller and an electric control cylinder 15 embedded and installed on the top wall of the placing frame 11, and the output shaft of the electric control cylinder 15 is coaxially and fixedly connected with a fixing plate 16; the electric control cylinder 15 is also in control connection with the controller, so that the controller can control the operation of the electric control cylinder 15, thereby adjusting the position of the fixing plate 16, so that the fixing plate 16 can cooperate with the placing frame 11 to fix automobile pedals of different sizes in the placing frame 11.

[0054] Specifically, during the installation of the automobile pedal, the test personnel can start the electric control cylinder 15 through the controller to drive the fixing plate 16 to move in the placing frame 11, thereby adjusting the distance between the fixing plate 16 and the bottom wall of the placing frame 11 (the adjustable range is 0-30mm), and thereby enabling the placing frame 11 to fix automobile pedals of different sizes, thereby improving the practicability and applicability of the test device as a whole (which can be applied to 90% of the automobile pedals on the market).

[0055] As shown in Figure 5 , the base 1 is provided with a piston cavity, and a piston plate 17 is vertically and slidingly fitted in the piston cavity; the rack 3 extends to the piston cavity at the bottom and is fixedly connected with the top of the piston plate 17 through bolts, and the base 1 is provided with a plurality of adsorption holes 18 at the bottom.

[0056] Specifically, when the rack 3 moves upward, the rack 3 will drive the piston plate 17 to move upward in the piston cavity (with a volume of 500ml), and since the base 1 is attached to the inner bottom wall of the automobile, at this time the piston cavity and the adsorption holes 18 will generate negative pressure (the maximum negative pressure value is about 10kPa), so that the device is further fixed with the automobile through the adsorption holes 18, which can effectively improve the stability of the device (by about 30%), thereby improving the accuracy of the test.

[0057] As shown in Figure 1 and Figure 2As shown, the top of the scale plate 7 is provided with an identification assembly for collecting images of the indicating plate 8 and the indicating needle 9; the identification assembly comprises an image identifier 20 fixedly connected to the top of the scale plate 7, and the image identifier 20 is also in control connection with the controller, so that the controller can control the image identifier 20 to operate.

[0058] Specifically, the image identifier 20 can effectively collect the images of the indicating plate 8 and the indicating needle 9, thereby facilitating the subsequent analysis of the displacement and rotation angle of the automobile pedal by the tester, and improving the automation degree of the device and the accuracy of data processing.

[0059] The present scheme can simultaneously measure the rotation angle and displacement of the automobile pedal through the design of the gear disc 5 and the rack 3, without the need to separately use two sets of equipment, thereby effectively improving the test efficiency and reducing the test cost and test complexity.

[0060] The existing travel test device only relies on electronic sensors for testing, lacks reliable mechanical measurement structures for auxiliary verification of the test results, and thus has low reliability of the test results; the present scheme can accurately obtain the rotation travel and movement travel of the automobile pedal through mechanical transmission, thereby realizing mechanical measurement of the rotation angle and displacement of the automobile pedal, and the tester can compare and analyze the test results of mechanical measurement with the test results of electronic sensor measurement, thereby improving the stability and reliability of the test.

[0061] Embodiment 2: Different from the above embodiment, a comprehensive analysis system is further included, the comprehensive analysis system comprises a displacement analysis module, an angle analysis module and a mechanical monitoring module, and each module is in communication connection with each other.

[0062] The specific functions of each module are as follows: The displacement analysis module is used for receiving the displacement of the automobile pedal collected by the displacement sensor to obtain a first displacement; is also used for collecting the image of the indicating plate 8 identified by the image identifier 20, analyzing the value currently indicated by the indicating plate 8 based on the image of the indicating plate 8, subtracting the error value of the displacement of the automobile pedal and the rack 3 from the value, obtaining the current displacement of the rack 3, calculating the displacement of the automobile pedal based on the proportion coefficient to obtain a second displacement; is also used for setting a displacement threshold value (which can be set according to the actual accuracy requirement), obtaining an actual displacement difference value according to the difference between the first displacement and the second displacement, and judging the reliability of the first displacement based on the actual displacement difference value and the displacement threshold value; when the actual displacement difference value is less than the displacement threshold value, the displacement analysis module judges that the first displacement is reliable; when the actual displacement difference value is greater than the displacement threshold value, the displacement analysis module judges that the second displacement is reliable, and issues a displacement sensor calibration reminder.

[0063] The second displacement calculation formula is as follows: .

[0064] Wherein, K is a proportional coefficient (value range is 1-5), L0 is the current displacement of rack 3, L2 is the second displacement.

[0065] Specifically, K is 3 in the embodiment, the displacement threshold is 3mm, and the displacement of the automobile pedal collected by the displacement sensor is assumed to be 32mm. The first displacement is 32mm. The value of the error between the automobile pedal and the displacement of the rack 3 is assumed to be 0.15mm. According to formula (1), the second displacement is 32.55mm. The difference between the first displacement and the second displacement is 0.55mm, which is less than the displacement threshold 3mm. Therefore, the displacement analysis module determines that the first displacement is reliable, and the data collected by the displacement sensor is accurate.

[0066] The angle analysis module is configured to receive the rotation angle of the automobile pedal collected by the angle sensor, and obtain the first rotation angle. The angle analysis module is also configured to collect the image of the indicating needle 9 recognized by the image recognizer 20, analyze the value indicated by the indicating needle 9 based on the image of the indicating needle 9, and obtain the current rotation angle of the gear disc 5.

[0067] The angle analysis module is configured to subtract the error value between the automobile pedal and the rotation angle of the gear disc 5 from the current rotation angle of the gear disc 5 to analyze the rotation angle of the automobile pedal, and obtain the second rotation angle. The angle analysis module is also configured to set a rotation threshold (which can be set according to actual accuracy requirements), calculate the difference between the first rotation angle and the second rotation angle, obtain the actual rotation difference, and determine the reliability of the first rotation angle based on the actual rotation difference and the rotation threshold. When the actual rotation difference is less than the rotation threshold, the angle analysis module determines that the first rotation angle is reliable. When the actual rotation difference is greater than the rotation threshold, the angle analysis module determines that the second rotation angle is reliable, and sends a calibration reminder of the angle sensor.

[0068] Specifically, the rotation threshold is 4° in the embodiment. The rotation angle of the automobile pedal collected by the angle sensor is assumed to be 31°. The first rotation angle is 31°. The value indicated by the indicating needle 9 is assumed to be 25°, and the rotation error is 0.1°. The second rotation angle is 25.1°. The difference between the first rotation angle and the second rotation angle is 5.9°, which is greater than the rotation threshold 4°. Therefore, the angle analysis module determines that the first rotation angle is unreliable, and the second rotation angle measured by the mechanical measurement is taken as the test result. At the same time, the angle analysis module sends a calibration reminder of the angle sensor to the tester, reminding the tester to maintain the angle sensor.

[0069] The mechanical monitoring module is configured to receive the pressure value of the placing frame 11 collected by the pressure sensor, and analyze the pressure value of the automobile pedal based on the pressure value of the placing frame 11, to obtain the pressure detection value.

[0070] Specifically, since the placing frame 11 rotates synchronously with the automobile pedal, and the placing frame 11 is pressed instead of the automobile pedal, the displacement and the rotation angle of the placing frame 11 are the same, and the pressure received by the placing frame 11 is equivalent to the pressure received by the automobile pedal, so the tester does not need to install an additional pressure sensor on the surface of the automobile pedal, and the monitoring convenience is improved.

[0071] Compared with the prior art, the present scheme compares and analyzes the data measured by the electronic sensor with the data measured and calculated by the machine, compares the test results measured by the machine with the test results measured by the electronic sensor, outputs the test results measured by the electronic sensor when the test results measured by the electronic sensor meet the reliability, improves the accuracy of the test results, outputs the results of mechanical measurement and calculation when the test results measured by the electronic sensor do not meet the reliability, and guarantees the reliability of the test results, thereby effectively ensuring the stable test by selective output.

[0072] Obviously, the above embodiments are only examples for clearly illustrating, but not limitation to the embodiments. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments are not required to be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A device for testing the stroke of an automobile pedal, comprising a pedal bracket (21) connected to an automobile pedal, characterized in that, Also include: Base (1), sliding frame (2) and rack (3), sliding frame (2) is installed on the top of base (1); Rack (3) is vertically slidingly installed in the sliding frame (2), and the teeth on the rack (3) extend out of the sliding frame (2); Mounting table (4) and gear disc (5), mounting table (4) is installed on one side wall of sliding frame (2), gear disc (5) is installed on the side away from the sliding frame of mounting table (4); The side close to the mounting table (4) of the gear disc (5) is fixedly connected with the spiral strip (6), and the spiral strip (6) is engaged with the rack (3); Scale board (7), scale board (7) is installed on the end away from base (1) of sliding frame (2); Scale board (7) is formed with a stroke line for measuring the displacement of rack (3), and the top of rack (3) is fixedly connected with an indicating plate (8), and the displacement of rack (3) can be obtained by observing the position of the indicating plate (8) corresponding to the stroke line; The edge of the gear disc (5) is formed with an angle line for measuring the rotation angle of the gear disc (5), and the side close to the gear disc (5) of the sliding frame (2) is fixedly erected with an indicating needle (9), and the rotation angle of the gear disc (5) can be obtained by observing the position of the indicating needle (9) corresponding to the angle line; Transmission assembly, transmission assembly is connected with automobile pedal and gear disc (5) respectively, for driving gear disc (5) to rotate synchronously with automobile pedal and retaining the travel test result.

2. The automotive pedal stroke testing device of claim 1, wherein, The transmission assembly comprises a rotating table (10), a placing frame (11), an extension rod (13) and a parallel rod (14). The rotating table (10) is coaxially connected with the gear disc (5). A ratchet pawl (12) is hinged to the outer side wall of the rotating table (10). The end of the ratchet pawl (12) away from the rotating table (10) is engaged with the gear disc (5), so that the gear disc (5) can rotate with the rotating table (10) when the rotating table (10) rotates. The extension rod (13) is installed on the side wall of the rotating table (10). A plurality of parallel rods (14) are hinged to the side of the extension rod (13) away from the rotating table (10). The ends of the parallel rods (14) away from the extension rod (13) are hinged to the placing frame (11). The extension rod (13) is parallel to the placing frame (11).

3. The automotive pedal travel test apparatus according to claim 2, characterized by The ratio of the displacement of the extension rod (13) when rotating to the displacement of the rack (3) when vertically sliding is set as a proportionality coefficient, and the proportionality coefficient is in the range of 1-5.

4. The automotive pedal travel test apparatus according to claim 2, characterized by The fixing assembly is used for fixing automobile pedals of different sizes in the placing frame (11). The fixing assembly comprises a controller and an electric cylinder (15) installed on the inner wall of the placing frame (11). A fixing plate (16) is fixedly connected to the output shaft of the electric cylinder (15). The controller is in control connection with the electric cylinder (15) and is used for controlling the operation of the electric cylinder (15) to adjust the position of the fixing plate (16).

5. The automotive pedal stroke testing device of claim 2 or 4, wherein, The bottom of the placing frame (11) is provided with an avoiding groove (19) for transversely sliding of the pedal support (21).

6. The automotive pedal travel test apparatus according to claim 4, wherein The top of the scale plate (7) is provided with an identification assembly for collecting images of the indicator plate (8) and the indicator needle (9); the identification assembly comprises an image identifier (20) fixedly connected to the top of the scale plate (7), and the image identifier (20) is in control connection with the controller, so that the controller can control the image identifier (20) to operate.

7. The automotive pedal travel test apparatus according to claim 6, wherein The placing frame (11) is provided with an electronic detection assembly for measuring the displacement, rotation angle and pressure value of the placing frame (11), and the electronic detection assembly comprises a displacement sensor, an angle sensor and a pressure sensor installed in the placing frame (11).

8. The automotive pedal travel test apparatus according to claim 7, characterized by Further comprising a comprehensive analysis system, the comprehensive analysis system comprises a displacement analysis module, an angle analysis module and a mechanical monitoring module; The displacement analysis module is used for receiving the displacement value of the automobile pedal collected by the displacement sensor to obtain a first displacement value; is also used for collecting the image of the indicator plate (8) recognized by the image identifier (20), analyzing the error value of the current indicated value of the indicator plate (8) based on the image of the indicator plate (8), obtaining the current displacement value of the rack (3), calculating the displacement value of the automobile pedal based on the proportion coefficient to obtain a second displacement value; is also used for setting a displacement threshold value, obtaining an actual displacement difference value according to the difference value between the first displacement value and the second displacement value, and judging the reliability of the first displacement value based on the actual displacement difference value and the displacement threshold value; When the actual displacement difference value is less than the displacement threshold value, the displacement analysis module judges that the first displacement value is reliable; when the actual displacement difference value is greater than the displacement threshold value, the displacement analysis module judges that the second displacement value is reliable, and sends a displacement sensor calibration reminder; The angle analysis module is used for receiving the rotation angle of the automobile pedal collected by the angle sensor to obtain a first rotation angle; is also used for collecting the image of the indicator needle (9) recognized by the image identifier (20), analyzing the current indicated value of the indicator needle (9) based on the image of the indicator needle (9), obtaining the current rotation angle of the gear plate (5), and analyzing the rotation angle of the automobile pedal based on the error value of the current rotation angle of the gear plate (5) minus the rotation angle of the automobile pedal and the gear plate (5) to obtain a second rotation angle; is also used for setting a rotation threshold value, calculating the difference value between the first rotation angle and the second rotation angle to obtain an actual rotation difference value, and judging the reliability of the first rotation angle based on the actual rotation difference value and the rotation threshold value; When the actual rotation difference value is less than the rotation threshold value, the angle analysis module judges that the first rotation angle is reliable; When the actual rotation difference value is greater than the rotation threshold value, the angle analysis module judges that the second rotation angle is reliable, and sends an angle sensor calibration reminder; The mechanical monitoring module is used for receiving the pressure value of the placing frame (11) collected by the pressure sensor, analyzing the pressure value of the automobile pedal based on the pressure value of the placing frame (11) to obtain a pressure detection value.

9. The automotive pedal travel test apparatus according to claim 8, wherein The second displacement value calculation formula is as follows: ； Wherein, K is the proportion coefficient, L0 is the current displacement value of the rack (3), and L2 is the second displacement value.

10. The automotive pedal travel test apparatus according to claim 1, characterized by The base (1) is internally provided with a piston cavity, and a piston plate (17) is vertically and slidingly fitted in the piston cavity; the rack (3) extends to the piston cavity at the bottom and is fixedly connected with the top of the piston plate (17), and the base (1) is provided with a plurality of adsorption holes (18) at the bottom.

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